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T2 CH4 Air — Science STD 6 — Question

Tamilnadu BoardEnglish MediumSTD 6ScienceT2 CH4 Air1 Mark
MCQ
______ is the percentage of nitrogen in air.
  • ✓
    $78 \%$
  • B
    $21 \%$
  • C
    $0.03 \%$
  • D
    $1 \%$
✓

Answer

Correct option: A.
$78 \%$
$78 \%$ is the percentage of nitrogen in air.

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